摘要
针对江西旱地红壤粘重板结、肥力低下等突出问题,基于野外旱地红壤定位试验,研究了低剂量生物质炭对旱地红壤增肥增产效果的影响。试验设置3个试验处理,即0(CK)、758(BC1)、1515(BC2)kg·hm^(-2)·a^(-1)3种生物质炭施用水平。结果表明:与对照相比,施入低剂量生物质炭(即BC1、BC2处理),旱地红壤在0~60 cm土层土壤容重分别降低了0.57%~2.05%和0.87%~4.88%,土壤pH分别提高了2.51%~13.66%和8%~12%,阳离子交换量分别提高了3.73%~6.45%和4.91%~7.13%;施用低剂量生物质炭在一定程度上提高了旱地红壤有机质和N、P、K养分含量,且随着生物质炭施用量的增加,有机质、全钾、速效钾呈上升趋势;连续施用低剂量生物质炭,BC1、BC2处理红薯产量在2013年分别提高了19.08%和23.68%,2014年分别提高了18.01%和22.98%。研究表明,施用低剂量生物质炭能有效改善旱地红壤的土壤理化性质和养分状况,提高旱地红壤肥力,有效增加作物产量。从综合投入产出来看,低剂量生物炭的连续施用更有实际应用价值和前景。
To resolve the problems of hardening of heavy clay and low fertility in upland red soils in Jiangxi Province,a field experiment was conducted to study the effects of low doses of biochar on fertility and production of upland red soils. The experiment included three doses of biochar： 0,758 and 1515 kg·hm^（-2）·a^（-1）（ denoted as CK,BC1 and BC2,respectively）. The results showed that,compared with CK,soil bulk density under BC1 and BC2 treatments decreased by 0.57%-2.05% and 0.87%-4.88%,soil p H increased by 2.51%-13.66% and 8%-12%,and soil cation exchange capacity increased by 3. 73%-6. 45% and 4. 91%-7. 13% in 0-60 cm,respectively.Application of low doses of biochar is beneficial to increasing the contents of organic carbon and N,P,and K in upland red soils,and the contents of organic carbon,total K and soil available K increased with increasing the dose of biochar. The crop yields under BC1 and BC2 treatments increased by 19. 08% and 23. 68% in 2013,and 18. 01% and 22. 98% in 2014,respectively.Therefore,application of low doses of biochar shows great prospects in increasing agricultural production by improving physical and chemical properties,nutrient utilization efficiency of upland red soils,and soil fertility. From the viewpoint of comprehensive input / output,continuous application of low-dose biochar exhibits more practical values and prospects.
出处
《生态学杂志》
CAS
CSCD
北大核心
2016年第3期647-654,共8页
Chinese Journal of Ecology
基金
国家自然科学基金项目(41461050)
江西省自然科学基金项目(20142BAB204016)
中国科学院土壤与农业可持续发展国家重点实验室开放基金(0812201236)
2015年度江西省研究生创新专项资金项目资助
关键词
生物质炭
旱地红壤
养分
增产
biochar
upland red soil
soil nutrient
increase of yield
